111
FNCA52 TJSJ 130703
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
303 AM AST SAT DEC 13 2025
DISCUSSION
MODEL GUIDANCE CONTINUES TO SUGGEST AN INCREASE IN MOISTURE DUE
TO THE APPROACH OF A DISTURBANCE MOVING THROUGH THE TRADE
WINDS FROM TODAY INTO EARLY SUNDAY, PROMOTING SHOWERS ACROSS THE
REGION. TODAY, RELATIVE HUMIDITY AND THE KBDI ARE NOT EXPECTED TO
MEET FIRE WEATHER CRITERIA. BREEZY CONDITIONS ARE EXPECTED ALONG
THE SOUTH COAST OF PR THROUGHOUT THE WEEKEND. THE FIRE DANGER WILL
REMAIN LOW TODAY.
PRZ014-140715-
SOUTHEAST COASTAL PLAINS-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 10
TEMP (24H TREND) 89 (+3) 71 (-2) 87
RH % (24H TREND) 59 (-11) 94 (+3) 60
WIND 20FT/EARLY(MPH) E 18 G24 E 13 E 17 G23
WIND 20FT/LATE(MPH) E 18 G24 E 13 E 17 G23
MIXING HGT(FT-AGL/MSL)4980 4650
TRANSPORT WND (MPH) E 21 E 20
VENT RATE (KT-FT) 89640 79050
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-140715-
SOUTHERN HILLS-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 0
TEMP (24H TREND) 85 (+4) 68 (-2) 84
RH % (24H TREND) 62 (-18) 99 (+7) 61
WIND 20FT/EARLY(MPH) E 16 E 14 SE 13
WIND 20FT/LATE(MPH) E 16 E 14 SE 13
MIXING HGT(FT-AGL/MSL)5610 5120
TRANSPORT WND (MPH) E 21 SE 20
VENT RATE (KT-FT) 100980 87040
DISPERSION 5 5
DSI 5 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-140715-
NORTH COASTAL PLAINS-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLDY MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 40 60 30
TEMP (24H TREND) 88 (+1) 70 (-2) 89
RH % (24H TREND) 63 (-17) 100 (+3) 57
WIND 20FT/EARLY(MPH) E 21 G23 E 20 G23 E 14 G17
WIND 20FT/LATE(MPH) E 21 G23 E 20 G23 E 14 G17
MIXING HGT(FT-AGL/MSL)5140 5720
TRANSPORT WND (MPH) E 21 SE 17
VENT RATE (KT-FT) 92520 85800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-140715-
NORTHERN HILLS-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 30
TEMP (24H TREND) 86 (0) 69 (-1) 88
RH % (24H TREND) 60 (-20) 100 (+4) 54
WIND 20FT/EARLY(MPH) E 19 E 18 E 13
WIND 20FT/LATE(MPH) E 19 E 18 E 13
MIXING HGT(FT-AGL/MSL)6010 6030
TRANSPORT WND (MPH) E 18 SE 17
VENT RATE (KT-FT) 96160 90450
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-140715-
WEST COAST-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 89 (+1) 70 (0) 89
RH % (24H TREND) 59 (-17) 97 (+5) 58
WIND 20FT/EARLY(MPH) E 16 E 17 SE 16 G18
WIND 20FT/LATE(MPH) E 16 E 17 SE 16 G18
MIXING HGT(FT-AGL/MSL)5210 5040
TRANSPORT WND (MPH) E 15 SE 21
VENT RATE (KT-FT) 67730 90720
DISPERSION 5 5
DSI 5 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-140715-
EASTERN INTERIOR-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLDY MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 60 60 20
TEMP (24H TREND) 85 (+2) 70 (-1) 85
RH % (24H TREND) 67 (-16) 100 (+2) 63
WIND 20FT/EARLY(MPH) E 16 E 16 SE 13
WIND 20FT/LATE(MPH) E 16 E 16 SE 13
MIXING HGT(FT-AGL/MSL)5000 4960
TRANSPORT WND (MPH) E 21 SE 18
VENT RATE (KT-FT) 90000 79360
DISPERSION 5 5
DSI 5 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-140715-
LUQUILLO MOUNTAIN RANGE-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 60 70 30
TEMP (24H TREND) 80 (+2) 67 (-2) 81
RH % (24H TREND) 73 (-14) 100 (0) 69
WIND 20FT/EARLY(MPH) E 13 E 12 SE 12
WIND 20FT/LATE(MPH) E 13 E 12 SE 12
MIXING HGT(FT-AGL/MSL)3980 4380
TRANSPORT WND (MPH) E 22 SE 20
VENT RATE (KT-FT) 75620 74460
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-140715-
CENTRAL MOUNTAIN RANGE-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10
TEMP (24H TREND) 85 (+5) 66 (-2) 85
RH % (24H TREND) 60 (-20) 99 (+6) 57
WIND 20FT/EARLY(MPH) E 12 E 12 SE 11
WIND 20FT/LATE(MPH) E 12 E 12 SE 11
MIXING HGT(FT-AGL/MSL)6520 5860
TRANSPORT WND (MPH) E 17 SE 18
VENT RATE (KT-FT) 97800 93760
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-140715-
CAYEY MOUNTAIN RANGE-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 60 20
TEMP (24H TREND) 80 (+2) 68 (-1) 80
RH % (24H TREND) 74 (-13) 100 (+1) 71
WIND 20FT/EARLY(MPH) E 13 E 11 E 12
WIND 20FT/LATE(MPH) E 13 E 11 E 12
MIXING HGT(FT-AGL/MSL)4240 4590
TRANSPORT WND (MPH) E 22 E 21
VENT RATE (KT-FT) 80560 82620
DISPERSION 5 5
DSI 5 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-140715-
VIEQUES-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 60 70 40
TEMP (24H TREND) 86 (0) 73 (-1) 86
RH % (24H TREND) 63 (-16) 96 (-2) 61
WIND 20FT/EARLY(MPH) E 19 G23 E 19 G23 E 14 G18
WIND 20FT/LATE(MPH) E 19 G23 E 19 G23 E 14 G18
MIXING HGT(FT-AGL/MSL)3310 4270
TRANSPORT WND (MPH) E 24 E 23
VENT RATE (KT-FT) 69510 85400
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-140715-
CULEBRA-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 60 70 40
TEMP (24H TREND) 87 (+1) 74 (-1) 87
RH % (24H TREND) 62 (-16) 97 (-1) 59
WIND 20FT/EARLY(MPH) E 19 G23 E 19 G23 E 16 G19
WIND 20FT/LATE(MPH) E 19 G23 E 19 G23 E 16 G19
MIXING HGT(FT-AGL/MSL)3280 4190
TRANSPORT WND (MPH) E 25 E 24
VENT RATE (KT-FT) 72160 87990
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-140715-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 10 10 0
TEMP (24H TREND) 90 (+3) 72 (-1) 89
RH % (24H TREND) 58 (-15) 94 (+8) 58
WIND 20FT/EARLY(MPH) E 23 G28 E 20 G25 E 20 G27
WIND 20FT/LATE(MPH) E 23 G28 E 20 G25 E 20 G27
MIXING HGT(FT-AGL/MSL)5310 4920
TRANSPORT WND (MPH) E 22 E 24
VENT RATE (KT-FT) 100890 103320
DISPERSION 5 5
DSI 5 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-140715-
SAINT THOMAS AND SAINT JOHN-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 60 70 40
TEMP (24H TREND) 86 (+1) 72 (-4) 86
RH % (24H TREND) 64 (-15) 100 (+4) 61
WIND 20FT/EARLY(MPH) E 19 G24 E 19 G24 E 16 G20
WIND 20FT/LATE(MPH) E 19 G24 E 19 G24 E 16 G20
MIXING HGT(FT-AGL/MSL)3240 3860
TRANSPORT WND (MPH) E 26 E 25
VENT RATE (KT-FT) 74520 84920
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-140715-
ST CROIX-
303 AM AST SAT DEC 13 2025
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 30
TEMP (24H TREND) 86 (+1) 73 (-3) 86
RH % (24H TREND) 66 (-13) 94 (0) 62
WIND 20FT/EARLY(MPH) E 19 G23 E 17 G21 E 16 G19
WIND 20FT/LATE(MPH) E 19 G23 E 17 G21 E 16 G19
MIXING HGT(FT-AGL/MSL)3580 4280
TRANSPORT WND (MPH) E 26 E 21
VENT RATE (KT-FT) 82340 77040
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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